Does not support Filefield

Doesn't seem to work with Filefields:
filefield: FileField was trying to display the file sites/default/files/example.pdf, but it does not exist.
Maybe, I'm hoping for too much. I appreciate that there are many contrib modules that deal with files and Stage File Proxy cannot understand them all, but given that FileField in D6 was the predecessor D7 core fields, I think it's reasonable to support this.